Australian Hobby
Falco longipennis
Smaller than other falcons, the Australian hobby is relatively slender and long winged. Its plumage varies in colour depending on sex, age and environment with a darker form in humid areas and a lighter form in drier environments. Generally the hobby displays a black cap and mask with a whitish forehead and half-collar. Underparts can be blue-grey or rufous and streaked darker. The cere in adults is a pale yellowish grey, the eye ring is pale blue, the eyes are brown and the feet are dull yellow. Females are larger in size between 34 and 35. Voice: Research undertaken comparing the vocalisations of Australian falcons, found that two structurally distinct calls were emitted when a male hobby was restrained. This included a wide band harmonic vocalisation and a trill-type vocalisation.
ID text from Wikipedia, CC BY-SA 4.0
Red-footed Falcon
Falco vespertinus
It is a medium-small, long-winged species. The adult male is all blue-grey, except for his red undertail and legs; its underwings are uniformly grey. The female has a grey back and wings, orange head and underparts, and a white face with black eye stripe and moustaches. Young birds are brown above and buff below with dark streaks, and a face pattern like the female. Red-footed falcons are 28–34 cm (11–13 in) in length with a wingspan of 65–75 cm (26–30 in). The average mass is 155 g (5.5 oz).
ID text from Wikipedia, CC BY-SA 4.0

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Play today's Daily BirdPhotos and recordings are credited to their authors under the licence shown. Full profiles: Australian Hobby and Red-footed Falcon.